How do I set and clear A/B points?

Q: How do I set and clear A/B points?

Press the A/B button once to set point A, and then rotate the focus knob to a desired distance and press the A/B button again to set point B. To clear the A/B points, press the A/B button again.

Question

Accepted Answer

Press the A/B button once to ‌set point A, and then rotate the focus knob to a desired distance and press the A/B button again to set point B. To clear the A/B points, press the A/B button again.